Loans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Net deferred costs	$ 45.5		$ 45.5		$ 43.1
Loans sold	9.1		9.1
Gain on sale of loans	0.9		0.9
Accrued interest receivable	40.1		40.1		39.4
Interest income on nonaccrual loans	$ 0.7	$ 0.3	0.9	$ 0.4
Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Remaining fair value adjustment for loans acquired			$ 151.4		$ 174.0
Percentage of fair value adjustment for loans acquired	4.50%		4.50%		4.80%